Vibration die cut stripping machine



6 Sheets-Sheet 2 2 m. v N1 ATTORNEY INVENTOR.

JOSEPH E. FOSTER,JR.

P mm

mm) vN Sept. 6,1966 J. FOSTER, JR

VIBRATION DIE CUT STRIPPING MACHINE Filed Aug. 15, 1964 Sept. 6, 1966 J. E. FOSTER, JR 3,270,929

VIBRATION DIE CUT STRIPPING MACHINE Filed Aug. 13, 1964 6 Sheets-Sheet 5 INVENTOR. JOSEPH E. FOSTER, JR.

BY mm W ATTORNEY p 1956 J. E. FOSTER, JR 3,

VIBRATION DIE CUT STRIPPING MACHINE Filed Aug. 13, 1964 6 Sheets-Sheet 4 3 I 1 m.4 a co I J INVENTOR.

JOSEPH E. FOSTER, JR.

ATTORNEY Sept. 6, 1966 J. E. FOSTER, JR 3,279,929

VIBRATION DIE CUT STRIPPING MACHINE Filed Aug. 13, 1964 6 Sheets-Sheet 5 FIG. IO

INVENTOR.

JOSEPH E. FOSTER, JR.

ATTORNEY Sept. 6, 1966 J. E. FOSTER, JR

VIBRATION DIE CUT STRIPPING MACHINE 6 Sheets-Sheet 6 Filed Aug. 13, 1964 FIG.

FIG.

INVENTOR. JOSEPH E. FOSTER JR.

ATTORNEY United States Patent 3,270,929 VIBRATION DIE CUT STRWPING MACHINE Joseph E. Foster, In, 29 Doe Lane, Malvern, Pa. Filed Aug. 13, 1964, Ser. No. 389,502 20 Claims. (Cl. 225-97) This invention relates to apparatus for removing scrap sections from cut and scored carton blanks and more particularly is directed to an automatic variable speed vibration type machine designed to operate equally well with various paper materials including heavy corrugated cardboard.

In making cardboard boxes, it is common practice to deliver large sheets of cardboard one by one to a die cutting apparatus provided with a series of blades which slit and score each sheet, thereby providing a plurality of box blanks interconnected by Waste areas. Also, it is frequently necessary to provide cut-outs in the box Walls, and after die cutting, these cut-outs also become waste areas. Heretofore, it has been common practice to remove the waste areas by means of manually operated hammers or in a punch press. Either of these methods requires an unusually large number of man-hours of work for the results accomplished and thereby materially increases the cost of production.

In those instances when automatic stripping machines are used, experience has shown that presently known devices all suffer from serious deficiencies, making their use quite expensive from a production standpoint. All of the existing equipment either picks, pulls or pushes the Waste portions out of the sheet using pins, male and female punch and dies, etc., all of which must be set individually exactly to correspond to the particular die cut pattern or product. This setting must be changed from pattern to pattern, product to product or run to run as the case may be in order to gain the desired result, causing increased production costs. i

Further, all presently known automatic stripping machines presently used in the paper converting industry to remove waste parts from a die cut sheet or web require a mechanism that is timed to act in direct relation to the movement of the sheet or Web, thereby greatly restricting adjustment of the machine in accordance with varying requirements of different materials.

It is therefore an object of the instant invention to provide a stripping machine that is universal in application suitable for operation with sheets and webs of all material.

It is another object of this invention to provide a die cut stripping machine incorporating novel rotary impacters thereby eliminating the need for male and female stripping dies corresponding to each cutting die.

It is another object of this invention to provide a die cut stripping machine capable of saving many man hours of labor by completely eliminating manual stripping operations.

It is another object of this invention to provide a novel die cut stripping machine requiring little or no set up time to handle varying orders of all descriptions.

It is another object of this invention to provide a novel die cut stripping machine capable of economically stripping short run orders.

It is another object of this invention to provide a die cut stripping machine of high speed capability featuring completely adjustable, independent rotary movements.

It is another object of this invention to provide a die cut stripping machine which is universal in character which may be readily adapted to handle any one of a number of different blanks in which the scrap may be differently located.

It is another object of this invention to provide a novel die cut stripping machine incorporating vibration inducing ice means impressing predetermined frequencies upon a sheet or web.

It is another object of this invention to provide a novel die cut stripping machine featuring completely adjustable, independent feed mechanism.

It is another object of this invention to provide a die cut stripping mechanism that is rugged in construction, universal in application and trouble free in operation.

Other objects and a fuller understanding of the invention Will be had by referring to the following description and claims of a preferred embodiment thereof, taken in conjunction with the accompanying drawings where like reference characters refer to similar parts throughout the several views and in which:

FIG. 1 is a perspective view of my invention from the delivery section end.

FIG. 2 is a detail side View partially broken away showing the novel rotary beaters.

FIG. 3 is a partial cross section taken along line 33 of FIG. 2.

FIG. 4 is a side elevational view of my invention indicating certain internal functioning parts in phantom lines.

FIG. 5 is a partial cross section taken along line 55 of FIG. 4 showing path of material across rotary beaters.

FIG. 6 is a detail perspective view of die cut blan-k entering stripping section of machine.

FIG. 7 is a detail cross section taken along line 77 of FIG. 1.

FIG. 8 is a skeleton side elevational view showing drive components.

FIG. 9 is a partial cross section taken along line 99 of FIG. 4.

FIG. 10 is a partial cross section taken along line 10 10 of FIG. 1.

FIG. 11 is a perspective view of a modified type of rotary beater.

FIG. 12 is a partial cross section taken along line 55 showing the modified type of beater.

'FIG. 13 is a cross section taken along line 13-43 of FIG. 12.

Although specific terms are used in the following description for the sake of clarity, these terms are intended to refer only to the particular structure of my invention selected for illustration in the drawings and are not intended to define or limit the scope of the invention.

Referring now to FIGS. 1 and 4, I show my novel rotary die-cut stripping machine consisting in essence in three component sections joined in continuous juxtaposed relation. The intake or feeding section is generally designated A and as hereinafter more fully set forth comprises a driven feeding conveyor belt 32, a driven roller 34 and a pair of vertically spaced rollers. In operation, the die-cut sheet is placed on the feeding conveyor which carries the sheet into the feed rolls 51, 52. The die-out sheet 53 is then sandwiched between the upper and lower feed rolls 51, 52 causing the sheet to be fed at an adjustable speed into the rotary stripping section. The upper feed roll 52 is adjustable in height to readily accommodate various thicknesses of board.

The stripping section, generally designated B, receives the die-cut sheet 53 from the feeding section A. The stripping section contains one or more rotary beaters 39, 40 postioned to contact the die-cut sheet upon rotation. The beaters rotate in the direction of sheet travel and are mounted in the path of the waste air stream to facilitate removal of scrap pieces 91, 92. As the die-cut sheet is fed into the rotary beaters 39, 40 the air stream impresses the sheet into the beaters thus assuring that each sheet will receive the full impact of the rotary beaters during each revolution. Dut to the vibration caused by multiple beater contacts, the force of the impacts and the effect of the air stream, cut-outs and trim 91, 92 are readily removed from the sheet mechanically with absolute no requirements for additional manual operations.

The delivery section has been designated C and comprises principally a driven delivery conveyor 93 and upper and lower receiver rollers 94, 95. The receiver rollers are positioned to receive the die-cut sheet 53 after it has left the feed rollers and the upper roller 94 is adjustable in height to accommodate various thicknesses of board. When the leading edge of the die-cut sheet is sandwiched between the upper and lower receiver rollers 94, 95, the trailing edge of the diecut sheet must be free of the upper and lower feed rollers 51., 52 to permit maximum impact and vibration.

To support feeding section A, stripping section B and delivery section C, I provide an integral, substantial structural steel bed comprising a pair of heavy, spaced, horizontal channels 10, 11 firmly supported above and parallel to floor 12 by a plurality of structural steel legs 13, 14, 15, 16, 17, 18, 19, 20, Sufficient structural steel bracing 21, 22, 23, 24, 25, 26, 27, 28, 29 may be provided as required to form a base of sutficient strength to adequately support the load under full operating conditions without undue deflection, vibration or deformation.

At feeding end 31 of steel frame 30, I provide an endless conveyor belt 32 rotatably mounted and stretching between rollers 33, 34. Rollers 33, 34 turn on shafts 35,36 which are rotatably mounted in bearings provided in plates 37, 38 afi'ixed to the side channels 10, 11 in the usual man ner. Belt 32 is urged in the direction of beaters 39, 40 by the action of motor 41 which drives pulley 42 through tento-one reduction gear box 106. Belt 43 connects driving pulley 42 with driven pulley 44 which is pinned or other-- Wise secured on roller shaft 36. I prefer to use a three phase, two hundred and twenty volt, sixty cycle alternating current motor of approximately one horsepower size for this purpose. Potentiometer 45 is conveniently mounted on side of stripping machine and varies speed of motor 41 in the usual manner thereby permitting ready adjustment of conveyor belt speed and feed roller speed through the interaction of pulleys 42, 44 and belt 43 and pulleys 103, 104 and belt 107. Roller shaft 35 and mounting plates 37 attach to frame members 10, 11 utilizing bolts in elongated slots 46, 47, 48, 49, thereby permitting limited conveyor belt tension adjusting means.

A pair of vertically spaced feed rollers 51, 52 receive unstripped blanks 53 from conveyor belt 32 and urge them horizontally across stripping section B. Upper feed roller 52 is vertically adjustable with respect to lower feed roller 51 so that the space therebetween may be varied to accommodate stock of any desired thickness. Handwheel 54 mounted externally from fan housing 55 adjusts height of feed roller 52 through a worm and gear arrangement (not shown) in any well known manner.

Motor 41 through reduction gear box 53 drives pulleys 103, 104 respectively pinned on shafts 36, 105 through belts 43, 107 which in turn rotate feed roller pulley 62 which is also pinned to shaft 105. Pulley 62 rotates feed roller 5]. and by means of a continuous belt 59 passing over tension adjusting pulleys 56, 60 and thence over respective roller pulleys 61, 62 also rotates upper feed roller 52.

In stripping section B, I provide one or more rotating heaters 39, 40 preferably of triangular configuration. However, it may be readily apparent that beaters of rectangular, hexagonal or other cross section configuration may be similarly employed and still fall within the scope of this invention. Beaters 39, 40 extend transversely across frame 30 having shafts 63, 64 journalled in pairs of bearing plates 65, 66 which are bolted to webs of channel sections 10, 11. Shaft slots 67, 68 and bearing plate bolt slots 108, 109 are vertically drilled in channel webs to permit vertical, manual adjustment of heaters 39, 40. As seen in FIGS. 2 and 6, heaters 39, 40 are geared to rotate sixty degrees out of phase. By such an arrangement, apices 69, 70, 71 of beater 39 and apices 72, 73, 74

4 of beater 40 alternately strike the blank 53 thereby imparting a maximum number of spaced beats.

Referring now to FIG. 5, the top of stripping section B is shown wherein horizontal transverse bars 75, 76, 77 bolted through respective webs of channels 10, 11 carry a plurality of longitudinal, alternately spaced flat iron strips 78 forming an open lattice like platform 79 to support blanks 53 during the stripping operation. It is the essence of the instant invention for heaters 39, 40 to repeatedly contact blank 53 and therefore, notches 80 are provided in the respective apices of triangular beaters 39, 40 of depth greater than thickness of strips 78. In this manner, when heaters rotate under the urging of motor 81, the apices of beaters extend upwardly through openings 82 between strips 78 to strike the under side of blank 53. Beaters 39, 40 rotate together and have desired phase relation maintained through the use of a continuous chain 83 turning upon gears 84, 85 respectively afiixed to shafts 63, 64. Motor 81 rotates driving pulley 86 which operates beater 39 through belt 87 and driven pulley 88 affixed to beater shaft 63. Potentiometer 89 controls speed of motor 81 in the usual manner to permit adjustment of the number of beats per minute as required by the characteristics of the individual die-cut blanks being stripped.

Delivery section C includes a delivery conveyor 93, a lower rotatable receiving roller and an upper rotatable receiving roller 94. Upper roller 94 is provided with vertically adjustable mechanism operated by handwheel 96 in any well known manner to permit vertical movement of roller 94 with respect to receiving roller 95. Roller 94 rotates upon shaft 111 which is journalled between movable side carriers 112, 113. Side carriers 112, 113 are spaced apart by connecting rods 114, 115 and have longitudinal movement along frame 30 utilizing supporting rollers 116, 117 bolted to carriers and rolling upon top flanges 118, 119 of channel sections 10, 11. Side carriers may be positioned as desired along delivery section C by means of rack 98 secured to frame 30 and cooperation pinion gear 120 operated by handwheel 97 connected through side carrier 112.

As best seen in FIGS. 1 and 7, delivery conveyor 93 comprises a plurality of endless V-belts 121 in horizontal juxtaposed relation spaced from each other and turning upon a plurality of driven sheaves 122 rotating upon rear conveyor shaft 123 which is journalled between frame sections 10, 11. Similarly, a plurality of driving sheaves 124 turning upon receiving roller shaft 125 form lower receiving roller 95 and drive V-belts 121. Belts 121 ride in individual upwardly facing metal channels 126 extending between respective sheaves 122, 124 and provided to adequately support uppermost portions of the belts. As seen in FIG. 7, the height of belts 121 is greater than height of channels 126 thereby permitting the blanks 53 to be carried without vrestriction to the rear end of the delivery conveyor. Channels 126 may be supported upon sheets 127 of sheet metal or other rigid construction carried upon frame sides 10, 11.

Referring now to FIGS. 9 and 10, it may be seen that fan housing 55 supports three industrial propeller type fans 128, 129, 130 each carried upon a structural steel support 131 and equipped with multi-bladed wheels 132 turning within downwardly directing, generally cylindrical, directional vanes 133. Each fan is rotated by means of a horizontally rotating V-groove sheave 134 connected to drive pulley 13.5 of motor 136 by endless V-belts 137, 138, 139. The volume of air delivered by the fans may be controlled by varying motor speed as by a potentiometer 90, or more preferably, by varying the air intake to the fans. A top opening 140 may be provided in fan housing 55 and equipped with a plurality of louvers 141 of the adjustable type. By means of an adjusting handwheel 142 turning operating stern 143 in the usual manner, the air intake opening 140 may be readily adjusted to vary the volume of intake air to be handled by the fans. Clear plastic panels 153 complete fan enclosure 55 and permit observation of the progress of the stripping operation. The machine drive mechanism may be observed by referring to FIGS. 4 and 8. Essentially, two independent drive systems have been provided. Namely, the beater system operated by motor 81 controlled through potentiometer 89 and the conveyor system operated by motor 41 controlledl through potentiometer 45.

Power from motor 81 is transmitted to heaters 39, 40 utilizing a belt 87 of the adjustable flex link type connecting driving pulley 86 at motor to driven pulley 88- secured to beater shaft 63. Multiple beaters 39, 40 rotate in unison and have their phase relationship maintained by employing sprocket gears 84, 85 respectively secured to beater shafts 63, 64 joined by driving chain 83. It is thus seen that the speed of rotation of the heaters may be separately adjusted as desired and such speed is entirely separate from the conveyor operation.

Power from motor 41 is transmitted to drive pulley 44 pinned to operating end shaft 36 of feed conveyor roller 34. Rotation of shaft 36 upon urging of motor 41 causes operation of conveyor belt 32 about rollers 33, 34. Corresponding pulleys 103, 104 respectively secured to operating ends of conveyor roller shaft 36 and to lower feed roller shaft 105 are joined by belt 107 thereby causing lower feed roller 51 to rotate at the same time the conveyor belt 32 is in operation. Pulley 62 is also pinned upon operating end of roller shaft 105 and drives belt 59 which connects pulley 56, tension adjusting pulley 60 and upper feed roller pulley 61 into a unitary rotating assembly. By utilizing the arrangement shown, upper feed roller 52 may be rotated at any level of vertical height adjustment required depending upon the thickness of the blank 53 being stripped. A sprocket (not shown) secured near the opposite end of feed roller shaft 105 connects with a sprocket (also not shown) similarly secured to opposite end of receiver roller shaft 125 through a continuous chain drive 144 thereby rotating receiver roller shaft 125 when feed roller 51 is turned.

Sprocket 102 pinned to operating end of receiver roller shaft 125 drives chain link belt 144 which connects sprockets 99, 100, 145, 146, and 147 into a unitary rotating assembly. Tension sprocket 101 may be incorporated when desired. Sprocket 147 is pinned to operating end of rear conveyor shaft 123 causing shaft to rotate in unison with receiving roller shaft 125 thereby driving V-belts 121 of delivery conveyor 93 through power of motor 41. Shaft 148 which rotatably supports sprocket 100 similarly has sprocket 149 secured to rotate in response to the energy imparted through belt 144. Sprocket 149 thus drives upper receiving roller sprocket 150 secured to roller shaft 111 and sprocket 151 through chain link belt 152. As sprocket 150 rotates shaft 111, upper receiver roller 94 is also caused to rotate. By utilizing the arrangement shown, upper receiver roller 94 may be rotated at any level of vertical height adjustment required depending upon the thickness of the blank 53 being stripped.

In operation, when impactors 39, 40 strike the blank 53, edges 69-74 drive the sheet upwardly with numerous, timed beats. At the same time, the sheet is continuously forced downwardly into the impactors by air pressure generated by the operation of fans 128, 129, 130. The vibrating action between a high and low pressure area shakes the waste pieces 91, 92 loose from the die cut blank 53 toward the low pressure area. The air rushing through the holes left by the waste pieces carries the pieces away. It is of importance to note that only one edge of the blank 53 may be held at one time to facilitate the vibrating action. That is, side carriers 112, 113 and thus upper receiving roller 94 should be so positioned along rack 98 that distance between feed rollers 51, 52 and receiving roller 94 is slightly greater than length of blank 53. Thereby, when either end of blank is being urged forwardly through the machine by either set of rollers, the other end remains free to vibrate as above set forth.

Referring now to FIGS. 11-13, I show a modified form of beater incorporating novel features especially designed to assure high quality production With no attendant loss in speed or efliciency. As indicated, I provide a single beater 155 comprising a plurality of beater segments 156, 157, 158 spaced along shaft 63 which is journalled in bearing plates 65, 66 as hereinbefore described. Segments 156-158 are constructed of square cross-sectional configuration and are keyed or otherwise secured along shaft 63 in aligned relation. Shaft 63 rotates under power from belt 87 acting upon pulley 88 turning all segments simultaneously.

Each respective beater segment is fabricated from square metal stock with each transverse end notched to receive an insert 159 of hard, plastic material to prevent streaking of any printed matter that may be found on the blank 53. I have found that Teflon inserts, /1. inch wide by inch high by 2% inches long cemented or otherwise secured to notches 160 provided at the corner of the segments 156-158 are suitable for this purpose.

A plurality of curved fingers 161, 162 cantilever from transverse bar 75 which is securely bolted through webs of channels 10, 11 thereby providing a bed for the passage of the die-cut blanks 53 while passing through the stripping section B. Fingers 161, 162 lie in spaces 163, 164 between respective segments 156-158 and arch above level of transverse bar 75. Tips 165 of segments 156- 158 extend above fingers 161, 162 to impart multiple impacts against bottom of die-cut blank 53 during the stripping operation. The curvature of fingers 161, 162 must be great enough to lift trailing edge 166 of die-cut sheet 53 above beater tips 165 after the sheet has been stripped. In such a manner, damage to the trailing edge 166 due to beater action after the stripping operation may be completely avoided.

In order to use my stripping machine, master switch 57 is first thrown on to permit electric current to flow to motors 41, 81 and 136. Handwheel 54 is then adjusted to optimum position for feed roller 51, 52 to pinch the blanks 53 between them and to urge them into the stripping section. Handwheel 96 is similarly adjusted to permit receiver roller 94 to pinch the stripped blanks against V-belts 121 and urge them into delivery conveyor 93. Handwheel 97 may then be turned to move side carriers 112, 113 along frame 30 until distance between feed rollers 51, 52 and delivery roller 94 is slightly greater than length of blanks to be stripped. Finally, potentiometers 45 and 89 may be adjusted for proper speed with relation to the stock being handled. This speed may also be varied during the run to obtain most efiicient operating conditions. Air louver handwheel 142 may be turned as required to admit sufficient air for proper vibration. In general, the smaller the cut out areas being stripped, the smaller volume of air will be required.

Although I have described my invention with a certain degree of particularity, it is understood that the present disclosure has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.

What is claimed is:

1. In a machine for removing scrap sections from out and scored blanks having leading and trailing edges, the combination of a feeding conveyor, a stripping section and a delivery conveyor in continuous juxtaposed relation; said feeding conveyor delivering said cut and scored blanks to said stripping section through feed roller means; said delivery conveyor carrying stripped blanks away from said stripping section through delivery roller means; and said stripping section supporting rotary beater means and fan means respectively mounted below and above said blanks when within said stripping section.

2. The invention of claim 1 wherein said delivery roller means move longitudinally along said machine in relation to said feed roller means.

3. The invention of claim 1 wherein said delivery roller means comprise an upper driven roller, a lower driven roller and means to move said upper roller both vertically and laterally with respect to said lower driven roller.

4. The invention of claim'l wherein said fan means blow said out and scored blanks into said beater means.

5.'The invention of claim 1 wherein said fan means comprise a plurality of motor driven fans and means for varying air input to said fans.

6. The invention of claim 1 wherein said fan means comprise a plurality of fans, motor means rotating said fans and louvers carried in exterior wall of said stripping section, said louvers equipped with adjustable blades and arranged to vary air input to said fans.

7. The invention of claim 1 wherein said beater means comprise rotary heaters in intermittent contact with said cut and scored blanks and means to vary speed 7 of rotation of said beaters.

8. The invention of claim '1 wherein said beater means comprise rotary heaters in intermittent contact with said cut and scored blanks, an electric motor rotating said heaters, an endless belt transmitting power of rotation from said motor to said beaters and a potentiometer connected in motor electrical circuit controlling speed of said motor whereby the frequency of beater contacts with said blanks may be varied.

9. The invention of claim 1 wherein said leading edge of blank vibrates freely in stripping section when said trailing edge of blank contacts said feed roller means.

10. The invention of claim 1 wherein said trailing edge of blank vibrates freely in said stripping section when said leading edge of blank contacts said delivery roller means.

11. The invention of claim 1 wherein said heater means have vertical adjustment with respect to said fan means.

12. The invention of claim 1 wherein said fan means, said beater means and said feeding conveyor are respectively equipped with independent speed varying controls.

13. The invention of claim 1 wherein said feeding conveyor, said feed roller means, said delivery roller means and said delivery conveyor are respectively interconnected and driven at the same speed by a common electric driving motor.

14. In a machine for removing scrap portions from cut and scored blanks having leading and trailing edges, the combination of feed conveyor means feeding previously die-cut blanks to a stripping section equipped with an open platform; delivery conveyor means receiving said blanks from the stripping section; and scrap stripping means within said stripping section, said stripping means including blank vibrating means and high and low pressure areas, said stripping means including a high pressure air stream, said stream forcing the said die-cut blank into the said vibrating means and the said blank dividing the high :pressure area from the said low pressure area whereby the scrap portions are directed toward the said low pressure area.

15. In a machine for removing scrap portions from cut and scored blanks having leading and trailing edges, the combination of feed conveyor means feeding previously die-cut blanks to a stripping section equipped with an open platform; delivery conveyor means receiving said blanks from the stripping section; and scrap stripping means within said stripping section, said stripping means including blank vibrating means and high and low pressure areas, said stripping means including a high pressure air stream, said stream forcing said die-cut blank into the said vibrating means, said delivery conveyor means being spaced from the said feed conveyor means 8 by a distance greater than distance between the leading and trailing edges of the blank and the said blank dividing the high pressure area from the said low pressure area whereby the scrap portions are directed toward the said low pressure area.

16. In a machine for removing scrap portions from cut and scored blanks having leading and trailing edges, the combination of feed conveyor means feeding previously die-cut blanks to a stripping section equipped with an open platform; delivery conveyor means receiving said blanks from the stripping section; and scrap stripping means within said stripping section, said stripping means including blank vibrating means and high and low pressure areas, said stripping means including a high pressure air stream, said stream forcing said die-cut blank into the said vibrating means, the said vibrating means comprising rotary beaters rotating below said platform, said beaters each having a portion thereof extending vertically above the platform to contact the blank and the said blank dividing the high pressure area from the said low pressure area whereby the scrap portions are directed toward the said low pressure area.

17. In a machine for removing scrap portions from cut and scored blanks having leading and trailing edges, the combination of feed conveyor means feeding previously die-cut blanks to a stripping section equipped with an open platform; delivery conveyor means receiving said blanks from the stripping section; and scrap stripping means within said stripping section, said stripping means including blank vibrating means and high and low pressure areas, said stripping means including a high pressure air stream, said stream forcing said die-cut blank into. the said vibrating means, the said delivery conveyor means being spaced from said feed conveyor means by a distance greater than distance between the leading and trailing edges of the said blank, said feed conveyor means including a pair of vertically spaced upper and lower feed rollers, said upper roller having vertical movement with relation to said lower roller and the said blank dividing the high pressure area from the said low pressure area whereby the scrap portions are directed toward the said low pressure area.

18. In a machine for removing scrap portions from cut and scored blanks having leading and trailing edges, the combination of feed conveyor means feeding previously die-cut blanks to a stripping section equipped with an open platform; delivery conveyor means receiving said blanks from the stripping section; and scrap stripping means within said stripping section, said stripping means including blank vibrating means and high and low pressure areas, said stripping means including a high pressure air stream, said stream forcing said die-cut blank into the said vibrating means, the said delivery conveyor means being spaced from said feed conveyor means by a distance greater than distance between the leading and trailing edges of the blank, said feed conveyor means including a pair of vertically spaced upper and lower feed rollers, said upper roller having vertical movement with relation to said lower roller, the said delivery conveyor means including a pair of vertically spaced upper and lower delivery rollers, said upper roller having vertical movement with relation to said lower delivery roller and the said blank dividing the high pressure area from the said low pressure area whereby the scrap portions are directed toward the said low pressure area.

19. In a machine for removing scrap portions from cut and scored blanks having leading and trailing edges, the combination of feed conveyor means feeding previously die-cut blanks to a stripping section equipped with an open platform; delivery conveyor means receiving said blanks from the stripping section; and scrap stripping means within said stripping section, said stripping means including blank vibrating means and a high and low pressure areas, said stripping means including a high pressure air stream, said stream forcing said die-cut blank into the said vibrating means, -the said delivery conveyor means being spaced from said tfeed conveyor means by a distance greater than distance between said leading and trailing edges of the blank, said feed conveyor means including a pair of vertically spaced upper and lower feed rollers, said upper roller having vertical movement with relation to said lower roller, the said delivery conveyor means including a pair of vertically spaced upper and lower delivery rollers, said upper roller having vertical and horizontal movement with relation to said lower delivery roller and the said blank dividing the high pressure area from the said low pressure area whereby the scrap portions are directed toward the said low pressure area.

20. In a machine for removing scrap portions from cut and scored blanks having leading and trailing edges, the combination of feed conveyor means feeding previously die-cut blanks to a stripping section equipped with an open platform; delivery conveyor means receiving said blanks from the stripping section; and scrap stripping means within said stripping section, said stripping means including blank vibrating means and high and low pressure areas, said stripping means including a high pressure air stream, said stream forcing said die-cut blank into the said vibrating means, the said delivery conveyor means being spaced from said feed conveyor means by a distance greater than distance between said leading and trailing edges of the blank, said feed conveyor means including a pair of vertically spaced feed rollers, said delivery conveyor means including a pair of vertically spaced delivery rollers, one of said delivery rollers having both vertical and horizontal movement with relation to said feed conveyor means and the said blank dividing the high 10 pressure area from the said low pressure area whereby the scrap portions are directed toward the said low pressure area.

References Cited by the Examiner UNITED STATES PATENTS 1,303,680 5/1919 Kent 83103 1,957,078 5/1934 Robillard 225103 1,977,690 10/ 1934 Norem 83-103 1,987,224 1/ 1935 Bergstein 9336 X 2,615,376 10/ 1952 Pelikan 9336 2,677,994 5/ 1954 Schneider. I

2,757,585 8/ 1956 Wenzel l 9336 3,019,824 2/1962 Bakke 83103 X 3,103,961 9/ 1963 Milligan 83103 X 3,117,499 l/1964 Golding.

3,128,929 4/ 1964 R-uud 225103 3,172,588 3/1965 Bertold et al 225103 X References Cited by the Applicant UNITED STATES PATENTS 1,428,952 9/ 1922 Fuhr. 2,034,269 3/ 1936 Price. 2,548,370 4/ 1951 Hedstrom et al. 2,778,286 1/ 1957 Walker. 2,888,860 6/1959 Baumgartner. 2,899,871 8/ 1959 Auer.

WILLIAM W. DYER, 111., Primary Examiner.

J. M. MEIS'PER, Assistant Examiner. 

1. IN A MACHINE FOR REMOVING SCRAP SECTIONS FROM CUT AND SCORED BLANKS HAVING LEADING AND TRAILING EDGES, THE COMBINATION OF A FEEDING CONVEYOR, A STRIPPING SECTION AND A DELIVERY CONVEYOR IN CONTINUOUS JUXTAPOSED RELATION; SAID FEEDING CONVEYOR DELIVERING SAID CUT AND SCORED BLANKS TO SAID STRIPPING SECTION THROUGH FEED ROLLER MEANS; SAID DELIVERY CONVEYOR CARRYING STRIPPED BLANKS AWAY FROM SAID STRIPPING SECTION THROUGH DELIVERY ROLLER MEANS; AND SAID STRIPPING SECTION SUPPORTING ROTARY BEATER MEANS AND FAN MEANS RESPECTIVELY MOUNTED BELOW AND ABOVE SAID BLANKS WHEN WITHIN SAID STRIPPING SECTION. 